Incubator



Aug. 26, 1930. MAYER 1,774,029

INGUBATOR Filed June 14, 1926 2 Sheets-Sheat- 1 L f- L 1 /6 I5 20 u 14 4 I2 l8 22 I 2s I 2 v v I F/a./.

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26 Filed Ju 19 B. A. MAYER 2 2 sheet Patented Aug. 26, 1930 UNITED STATES BRUCE A. MAYER, or SPRING-FIELD, onro INGUIBATOR Application filed June 14, 1926. Serial No. 115,807.

My invention relates to incubators.

It is the object of my invention to provide an incubator without moving parts for the circulation of air and with means for evacuating vitiated air without the necessity of fans or other moving mechanism.

Referring to the drawing:

Figure 1 is a section through the tor and a section through the circulating and evacuating pipe.

Figure 2 is a section taken on the horizontal plane, as shown by the line 2-2 of Figure 1.

Referring to thedrawing in detail, 1 is the top of an insulated cabinet of the incubator having side walls 2 and 3 and end walls 4. The incubator is provided with the. usual door not shown. The bottom of the cabinet is pro-. vided with doors 5 hinged at 6 adjacent a heating compartment 7 beneath the wire screen floor 8. 9 designates generally a heator suitably controlled by a switch 10.--11 designates the bottom of the cabinet just beneath the heater. I 1

The upper part of the cabinet is occupied by a series of egg trays 12 of the usual character supported on guides or slides 13 which are, in turn, supported by theuprights 14.

Circulating pipes for circulating the air are connected at the upper circulating openings 15 and are designated 16, passing down the outside of the cabinet preferably and entering the cabinet at the bottom at 17 The air is so circulated by reason of the fact that the heated air rises passing into the tube 16, descends as it is cooled and enters again through the opening 17 where it joins the heated air that is rising. Thus, a constant circulation of air is maintained.

In order to draw out vitiated air, I provide an evacuating pipe 18, the lower .open end of which 19 is located below the lowermost trays near the bottom of the tray compartment. The pipe passes upwardly and out the cabinet through a sealed opening 20 across the top of the cabinet, as at 21, and extends downwardly in a leg 22 below the top of the cabinet, discharging at 23;

The purpose of the pipe 18 is to remove accumulated carbon dioxide laden air from the. lower part of the incubator. The heated carincuba- Letters Patent, is

bon dioxide laden'air rises in the tube 18 and passes out and across the top through pipes 21 and down through pipes 22, out at the discharge end 23. The heated carbon dioxide laden air readily rises through the tube 18 and when it gets into the descending tubes 22 it will fall due to the carbon dioxide laden I find that it is preferableto extend this leg I 22 about eight or ten inches below the top of the casing. 7

With two pipes 18 of an interior diameter I of two inches in a casing six feet high, four i feet deep and three feet wide,'I can exhaust the entire vitiated air every 8.2 minutes. 1

By utilizing these pipes, I can draw off through these pipes the carbon dioxide which travelsin the lower part 'ofthe casing, drawinginfresh air through the bottom of the casing which'may be-regulated by the trap doors 5. v a

The temperature within the incubator is approximately 100 degrees Fahrenheit. The

temperature of the outside air where the neck of the siphon tube is located is usually from sixtyto eighty degrees Fahrenheit.

It will be understood that I desire to comprehend within my. invention such modifications-as may be necessary to adapt it to varying conditions and uses.

Having thus fully described my invention,

what I claim as new and desire to secure by In an incubator consisting of closedcasing having air entrance doors at the bottom thereof, a heater in the bottom thereof, a plurality of trays to contain eggs located'above said heater, air circulating means consisting of a tube leading from above the trays outside of the incubator back to a. point belowthe trays, air outlet means consisting of a tube having its open lower end at a point below the'trays extending upwardly and out of the incubator across the top of the incubator and discharging at a point below the top of the incubator.

In testimony whereof, I aflix my signature.

' BRUCE A. MAYER. 

